Complex pattern formation by a self-destabilization of established patterns: chemotactic orientation and phyllotaxis as examples
Complex pattern formation by a self-destabilization of established patterns: chemotactic orientation and phyllotaxis as examples
复制标题
DOI：
10.1016/s1631-0691(03)00018-0
复制
发表时间：
2003-02-01
影响因子：
2
通讯作者：
Meinhardt, H
中科院分区：
文献类型：
--
作者：
Meinhardt, H
稳定的模式可以通过涉及局部自我增强和远程抑制的分子相互作用产生。相反，如果以这种方式生成的最大值因第二个拮抗反应而变得不稳定，则会产生高度动态的模式。后者必须在当地发挥作用，并且必须是持久的。千里马要么消失并重新出现在移位的位置，要么它们以行波的形式在场地上移动。这种波具有不寻常的特性，因为它们可以相互穿透而不会湮灭。由此产生的模式与在不同生物系统中观察到的模式相对应。在细胞的趋化定向中，临时信号允许在趋化剂施加的微小外部不对称的控制下局部延伸突起。在叶序中，这些信号导致连续的叶子萌生，从而持久的熄灭反应可以导致随后的叶子萌生位点位移典型的 137.5 度（黄金角）。在贝壳上，这种图案要么形成可以相互交叉的斜线，要么形成倾斜的点行。对于某些模型的动画模拟，请访问 http://www.eb.tuebingen.mpg.de/abt.4/meinhardt/theory.html。引用这篇文章：H. Meinhardt, C R. Biologies 326 (2003)。 (C) 2003 年科学院/Elsevier SAS 科学与医学版。版权所有。
Stable patterns can be generated by molecular interactions involving local self-enhancement and long-range inhibition. In contrast, highly dynamic patterns result if the maxima, generated in this way, become destabilized by a second antagonistic reaction. The latter must act local and must be long-lasting. Maxima either disappear and reappear at displaced positions or they move over the field as travelling waves. The wave can have unusual properties in that they can penetrate each other without annihilation. The resulting pattern corresponds to those observed in diverse biological systems. In the chemotactic orientation of cells, the temporary signals allow the localized extensions of protrusions under control of minute external asymmetries imposed by the chemoattractant. In phyllotaxis, these signals lead to successive leaf initiation, whereby the longer-lasting extinguishing reaction can cause a displacement of the subsequent leaf initiation site by the typical 137.5degrees, the golden angle. On seashells, this patterns leads either to oblique lines that can cross each other or to oblique rows of dots. For some of the models animated simulations are available at http://www.eb.tuebingen.mpg.de/abt.4/meinhardt/theory.html. To cite this article: H. Meinhardt, C R. Biologies 326 (2003). (C) 2003 Academie des sciences/Editions scientifiques et medicales Elsevier SAS. All rights reserved.